Electromagnetic switch.



- l/ y a G m/2f ('opeinan L. G. COPEMAN.

ELECTROMAGNETIC SWITCH. APPLICATION FILED JULY28, 191i.

1 1 41 1 74:. Patented June 1, 1 915.

77? mass as W Y 1}) V6)? for -the bridge UNITED s'rarns ra'rn iaronrenn, nssrenon TO, corniuari nnnornrc FLINT, MICHIGAN, A {JORIEORATIQN or nircrirsnn.

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Application filed July 28,1911. Serial No. 641,004.

To all whom it may concern Be it known that I, LLOYD Gnorr Corn- MAN, a citizen of the United States of America, residing at Flint, in the county of Grenesee and State of Michigan, have invented certain new and useful Improvements in Electromagnetic Switches, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to automatic electrical circuit breakers, and is more particularly designed for use in connection with electric cookers.

It is the obj ect'of the invention to obtain a reliable construction which is small and inexpensive to manufacture and which is particularly adapted to fill the requirements of the apparatus in connection with which itis used, as more fully hereinafter set forth.

In the drawings,-Figure 1 isan elevation of the circuit breaker as arranged in connection with an electric cooking range; Fig. 2' is a perspective viewthereof; and Fig. 3 is a front elevation,

A is a base which is'provided at its upper end with a shelf or bracket 13 forming the support for one or more magnets C. These are preferably arranged in pairs to form a horseshoe construction,

the shelf B which is preferably of magnetic metal. 1'

D is an electric switch arranged beneath the magnet blade E pivotally connected at its lowerend with a post F. This post is mounted upon an insulator plate for the base plate secured to said insulator ward in proximity to the free end of the blade E.

I is a contact plate adapted to abut against a contact plate I on the end of the post H and yieldably secured to the inner side of the-blade E. Asfshown, this contact I is secured to a resilient strip J which is attached at K to the blade and has a projecting portion L bent to contact with the post F and under tension to press the blade E outward. The blade E is normally held. in

Specification of Letters Patent.

depending electro between the two being formed by I C and provided with a hinged G which forms a facing A, and a second post H is plate extending out- Patented June ii,

position to close the circuit by a httch. menn ber M which engages the free end thereof, said latch member being pivotally mounted at N to the base plate A.

O is an armature for the electromagnct (i which is guided by engaging pins P of nonmagnetic metal projecting downward from.

containing the electric cooker, but a handle T projecting outward from the blade. E passes through the slot U in this cabinet. Thus the switch may be closed by lifting the handle T through the medium of an insulator knob V and when the contact T is pressed against the post H by the resilient strip {5 the latch M will engage the blade E and hold it from outward movement. in this position of parts the switch will remain closed until the electromagnet C is energized, preferably through the medium of a suitable thermostatic control (not shown) which will lift the armature and latch, disengaging the blade E and permitting gravity assisted by the tension of the spring ii to open the switch.

With certain constructions of apparatus, the switch may be most conveniently located near th base of the cabinet, and in this pcsition it may be operated without the necessity of bending over by lifting the knob V with the foot.

The latch is gravity actuated, andby reason ofits loose connection with the guide pins P is always in position for engagement with the blade E. The contact plate l abuts against the post H and therefore does not tend to might be the case with the knife switch, so that the certainty of operation. is insured.

What I claim as my invention is:

In an electric switch, the combination with an insulator base, of a post projecting there hold the blade from movement as Y contact With the post projecting from said from, a switch blade pivetally connected to base, and a cemmon securing means for both said post, a resilient strlp secured to sa1d of said resilient strips.

blade, :1- contact member upon said strip, a In testimonywhereof I aflix my signature co'ciperating post against which said contact in presence of two Witnesses. member is adapted-t0 be pressed by said LLOYD GEOFF COPEMA switch blade a second resilient strip secured Witnesses: to said blade having a projecting portion in G. H. ABBOTT,

M. CERF. 

